def Verify(self):
"""
Verify block using the verification script.
Returns:
bool: True if valid. False otherwise.
"""
if not self.Hash.ToBytes() == GetGenesis().Hash.ToBytes():
return False
bc = GetBlockchain()
if not bc.ContainsBlock(self.Index):
return False
if self.Index > 0:
prev_header = GetBlockchain().GetHeader(self.PrevHash.ToBytes())
if prev_header is None:
return False
if prev_header.Index + 1 != self.Index:
return False
if prev_header.Timestamp >= self.Timestamp:
return False
# this should be done to actually verify the block
if not Helper.VerifyScripts(self):
return False
return True
def Verify(self, mempool):
"""
Verify the transaction.
Args:
mempool:
Returns:
bool: True if verified. False otherwise.
"""
logger.info("Verifying transaction: %s " % self.Hash.ToBytes())
return Helper.VerifyScripts(self)
def Verify(self, mempool):
self.__log.debug("Verifying transaction: %s " % self.Hash.ToBytes())
return Helper.VerifyScripts(self)
def Verify(self, mempool):
self.__log.debug("Verifying transaction: %s " % self.HashToString())
for i in range(1, len(self.inputs)):
j = 0
while j < i:
j = j + 1
if self.inputs[i].PrevHash() == self.inputs[j].PrevHash(
) and self.inputs[i].PrevIndex() == self.inputs[j].PrevIndex():
return False
self.__log.debug("Verified inputs 1")
for tx in mempool:
if tx is not self:
for ip in self.inputs:
if ip in tx.inputs:
return False
self.__log.debug("Verified inputs 2, checking double spend")
if GetBlockchain().IsDoubleSpend(self):
return False
self.__log.debug("verifying outputs ...")
for txOutput in self.outputs:
asset = GetBlockchain().GetAssetState(txOutput.AssetId)
if asset is None: return False
if txOutput.Value % pow(10, 8 - asset.Precision) != 0:
return False
self.__log.debug("unimplemented after here ...")
return True
txResults = self.GetTransactionResults()
if txResults is None: return False
destroyedResults = []
[
destroyedResults.append(tx) for tx in txResults
if tx.Amount == Fixed8(0)
]
numDestroyed = len(destroyedResults)
if numDestroyed > 1:
return False
if numDestroyed == 1 and destroyedResults[0].AssetId != GetSystemCoin(
).Hash():
return False
if self.SystemFee() > Fixed8(0) and (
numDestroyed == 0
or destroyedResults[0].Amount < self.SystemFee()):
return False
issuedResults = []
[
issuedResults.append(tx) for tx in txResults
if tx.Amount() < Fixed8(0)
]
if self.Type == TransactionType.MinerTransaction or self.Type == TransactionType.ClaimTransaction:
for tx in issuedResults:
if tx.AssetId != GetSystemCoin().Hash():
return False
elif self.Type == TransactionType.IssueTransaction:
for tx in issuedResults:
if tx.AssetId != GetSystemCoin().Hash():
return False
else:
if len(issuedResults) > 0:
return False
usageECDH = 0
for attr in self.Attributes:
if attr.Usage == TransactionAttributeUsage.ECDH02 or attr.Usage == TransactionAttributeUsage.ECDH03:
usageECDH = usageECDH + 1
if usageECDH > 1:
return False
return Helper.VerifyScripts(self)
def Verify(self, mempool):
logger.info("Verifying transaction: %s " % self.Hash.ToBytes())
return Helper.VerifyScripts(self)
